扫频音产生的瞬态耳声发射的信噪比改善

Signal-to-noise ratio improvement of swept-tone-generated transient otoacoustic emissions.

作者信息

Bennett Christopher L, Mihajloski Todor, Özdamar Özcan

机构信息

Music Engineering Technology, Frost School of Music, University of Miami, Founder's Hall Rm. 140, 1550 Brescia Ave, Coral Gables, FL, 33146, USA.

Department of Biomedical Engineering, College of Engineering, University of Miami, McArthur Annex Rm. 219, 1251 Memorial Dr, Coral Gables, FL, 33146, USA.

出版信息

Med Biol Eng Comput. 2017 Jan;55(1):69-78. doi: 10.1007/s11517-016-1507-8. Epub 2016 Apr 22.

DOI:10.1007/s11517-016-1507-8

PMID:27106751

Abstract

In this study, we utilized the swept-tone (ST) deconvolution method for comparing the signal-to-noise ratio (SNR) characteristics of ST otoacoustic emissions (OAE) to conventionally acquired click, or transient-evoked (TE), OAE. We generated a hearing-level equalized (HLeq) ST stimulus based on normative loudness metrics at the different frequencies present in the ST. Due to noise-shaping properties of the ST deconvolution method, we anticipated a theoretical SNR gain of +4.26 dB in STOAE compared to TEOAE acquired under comparable settings. This prediction was confirmed by computer simulation. HLeq STOAE and TEOAE were then acquired from each of the 22 ears that were tested at five stimulation levels from 5 to 45 dB HL, and analyzed responses in terms of their overall SNR. We found that the overall SNR of the HLeq STOAE responses at stimulation levels at or above 15 dB HL was significantly higher than that of TEOAE by an average of +3.6 dB. Importantly, this leads to recording quality and time-saving improvements in clinical hearing screenings.

摘要

在本研究中，我们采用扫频（ST）去卷积方法，比较ST耳声发射（OAE）与传统采集的短声或瞬态诱发（TE）OAE的信噪比（SNR）特性。我们根据ST中不同频率的标准响度指标生成了听力水平均衡（HLeq）的ST刺激。由于ST去卷积方法的噪声整形特性，我们预计与在可比设置下采集的TEOAE相比，STOAE的理论SNR增益为+4.26 dB。这一预测通过计算机模拟得到了证实。然后从22只耳朵中每只耳朵采集HLeq STOAE和TEOAE，测试了5至45 dB HL的五个刺激水平，并根据其总体SNR分析反应。我们发现，在15 dB HL及以上刺激水平下，HLeq STOAE反应的总体SNR显著高于TEOAE，平均高出+3.6 dB。重要的是，这在临床听力筛查中带来了记录质量的提高和时间的节省。